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Deuterium post-metallization anneal of electrochemical-plated Cu film deposited on different barrier materials

In this paper, we report on electrochemical-plated (ECP) copper (Cu) film characterizations with different (Ta, TaN and TiN) barrier materials subjected to post-metallization-annealing (PMA) in deuterium (D 2) under various annealing conditions. For comparison, post-metallization-anneal of the ECP C...

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Published in:Thin solid films 2004-08, Vol.461 (2), p.294-300
Main Authors: Wu, You-Lin, Hwang, Yi-Cheng
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description In this paper, we report on electrochemical-plated (ECP) copper (Cu) film characterizations with different (Ta, TaN and TiN) barrier materials subjected to post-metallization-annealing (PMA) in deuterium (D 2) under various annealing conditions. For comparison, post-metallization-anneal of the ECP Cu film in pure nitrogen (N 2) and forming gas (20% hydrogen+80% nitrogen) were also performed. We used four-point probe to determine the sheet resistance. Scanning electron microscopy was used to examine the surface morphology of the after-annealed ECP Cu films. X-ray-diffraction (XRD) analysis was used to inspect the texture of the ECP Cu films before and after PMA. The deuterium distribution in the barrier layer was determined by using the secondary ion mass spectroscopy depth profile analysis. We found that under appropriate PMA conditions, the sheet resistance of ECP Cu films deposited on TaN barrier was the lowest after D 2 PMA when compared with those deposited on TiN and Ta barriers.
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subjects Annealing
Cold working, work hardening
annealing, post-deformation annealing, quenching, tempering recovery, and crystallization
Cold working, work hardening
annealing, quenching, tempering, recovery, and recrystallization
textures
Copper
Cross-disciplinary physics: materials science
rheology
Deuterium
Electrodeposition, electroplating
Exact sciences and technology
Materials science
Metallization
Methods of deposition of films and coatings
film growth and epitaxy
Physics
Treatment of materials and its effects on microstructure and properties
title Deuterium post-metallization anneal of electrochemical-plated Cu film deposited on different barrier materials
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